Fixes in Ethernet/c code

These changes do a number of things:

Fix buffer overflow problem in E-TC32.c. 49 bytes for reply buffer is not large enough for calCoeff.
Fix conflicts of names CJC and CELSIUS with cbw.h. My application needs to include the Measurement Computing cbw.h, but it already defined CELSIUS and CJC. Change the names in this code.
Fix conflicts of struct calCoeff. It is defined differently in E-TC.h and E-TC32.h. My application needs to include both of these header files, so the struct names need to be different.
Fix typo in E-DIO24.c that would not compile.
Fix function prototype in E-TC.h.

wjasper / Linux_Drivers